make ipmb responses const

[rsbs2] / bmc / ipmb.c

#include <avr/pgmspace.h>
#include <string.h>
#include <stdio.h>

#include "i2c.h"
#include "chassis.h"
#include "ipmb.h"

uint8_t ipmb_csum(unsigned char *buf, int len)
{
	uint8_t csum = 0x00;
	int i;

	for(i = 0; i < len; i++) {
		csum += buf[i];
	}

	return -csum;
}

void ipmb_send(struct ipmb_resp *resp, const unsigned char *data, uint8_t datalen)
{
	unsigned char buf[24];
	int len;
#ifdef DEBUG
	int i;
#endif

	buf[0] = resp->rqSA;
	buf[1] = ((resp->netFn)<<2) | (resp->rqLUN & 0x3);
	buf[2] = ipmb_csum(buf, 2);
	buf[3] = resp->rsSA;
	buf[4] = ((resp->rqSEQ)<<2) | (resp->rsLUN & 0x3);
	buf[5] = resp->cmd;
	memcpy(buf+6, data, datalen);
	len = datalen + 7;
	buf[len-1] = ipmb_csum(buf+3, len - 4);

#ifdef DEBUG
	printf("Sending: ");
	for(i = 0; i < len; i++) {
		printf("0x%02x ", buf[i]);
	}
	printf("\n");
#endif

	i2c_send(buf, len);

}

#ifdef DEBUG
void ipmb_dump_req(struct ipmb_req *req)
{
	int i;

	printf(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n");
	printf("Connection Header:\n");
	printf("\trs Slave Addr.: 0x%02x\n", req->rsSA);
	printf("\tnetFn: 0x%02x, LUN: 0x%02x\n", req->netFn, req->rsLUN);
	printf("Data:\n");
	printf("\trq Slave Addr.: 0x%02x\n", req->rqSA);
	printf("\trqSeq: 0x%02x, rqLUN: 0x%02x\n", req->rqSEQ, req->rqLUN);
	printf("\tcmd: 0x%02x\n", req->cmd);
	printf("\tData: ");
	for(i = 0; i < req->datalen; i++) {
		printf("0x%02x ", req->data[i]);
	}
	printf("\n");
	printf("<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<\n");
}
#endif

void ipmb_invalid(struct ipmb_resp *resp)
{
#if 1
	const unsigned char cmd_invalid[] = {IPMB_CC_INVALID};

	ipmb_send(resp, cmd_invalid, sizeof(cmd_invalid));
#endif
}

void ipmb_cmd(struct ipmb_req *req)
{
	struct ipmb_resp resp;
	const unsigned char get_devid[] =
		{IPMB_CC_NORMALLY, 0x42, 0x42, 0x01, 0x01, 0x51, 0xff /* Add. Dev. Supp */, 0x00, 0x00, 0x00, 0x00, 0x00 };
	const unsigned char get_wd_timer[] =
		{IPMB_CC_NORMALLY, 0x42, 0x00, 0x00, 0x04, 0xff, 0xff, 0xfe, 0xfe};
	const unsigned char cc_normal[] =
		{IPMB_CC_NORMALLY};
	const unsigned char sel_info[] =
		{IPMB_CC_NORMALLY, 0x51, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00};
	const unsigned char sel_alloc_info[] =
		{IPMB_CC_NORMALLY, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
	const unsigned char sel_entry[] =
		{IPMB_CC_ERROR};
	const unsigned char sel_timestamp[] =
		{IPMB_CC_NORMALLY, 0x00, 0x00, 0x00, 0x00};
	const unsigned char chassis_status[] =
		{IPMB_CC_NORMALLY, 0x60, 0x10, 0x00, 0x00};
	const unsigned char reserve_sdr[] =
		{IPMB_CC_NORMALLY, 0x00, 0x00};
	const unsigned char get_sdr[] =
		{IPMB_CC_NORMALLY, 0xff, 0xff};

	resp.rqSA = req->rqSA;
	resp.netFn = req->netFn+1;
	resp.rqLUN = req->rqLUN;
	resp.rsSA = req->rsSA;
	resp.rqSEQ = req->rqSEQ;
	resp.rsLUN = req->rsLUN;
	resp.cmd = req->cmd;

	switch (req->netFn) {
		case IPMB_NETFN_CHASSIS:
			switch (req->cmd) {
				case IPMB_CHASSIS_GET_STATUS:
					ipmb_send(&resp, chassis_status, sizeof(chassis_status));
					break;
				case IPMB_CHASSIS_CONTROL:
					chassis_control(*(req->data));
					ipmb_send(&resp, cc_normal, sizeof(cc_normal));
					break;
				default:
#ifdef DEBUG
					printf("Unknown chassis cmd 0x%02x\n", req->cmd);
					ipmb_dump_req(req);
#endif
					ipmb_invalid(&resp);
					break;
			}
			break;

		case IPMB_NETFN_SENSOR_EVENT:
			switch (req->cmd) {
				case IPMB_SE_PLATFORM_EVENT:
					/*
					 * >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
					 * Connection Header:
					 *         rs Slave Addr.: 0x24
					 *         netFn: 0x04, LUN: 0x00
					 * Data:
					 *         rq Slave Addr.: 0x28
					 *         rqSeq: 0x03, rqLUN: 0x00
					 *         cmd: 0x02
					 *         Data: 0x03 0xc8 0x00 0x6f 0x61 0x8f 0x03
					 * <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
					 * data[0] - EvMRev:				0x03
					 * data[1] - Sensor Type:			0xc8
					 * data[2] - Sensor #:				0x00
					 * data[3] - Event Dir(1)|Event Type(7):	0x6f: 0x0|0x6f (assert, discrete)
					 * data[4] - Event Data:			0x61
					 * data[5] - Event Data:			0x8f
					 * data[6] - Event Data:			0x03
					 */
					ipmb_send(&resp, cc_normal, sizeof(cc_normal));
					break;

					
				default:
#ifdef DEBUG
					printf("Unknown sensor cmd 0x%02x\n", req->cmd);
					ipmb_dump_req(req);
#endif
					ipmb_invalid(&resp);
					break;
			}
			break;

		case IPMB_NETFN_APP:
			switch (req->cmd) {
				case IPMB_APP_GET_DEVICE_ID:
					ipmb_send(&resp, get_devid, sizeof(get_devid));
					break;

				case IPMB_APP_GET_WATCHDOG_TIMER:
					ipmb_send(&resp, get_wd_timer, sizeof(get_wd_timer));
					break;

				default:
#ifdef DEBUG
					printf("Unknown app cmd 0x%02x\n", req->cmd);
					ipmb_dump_req(req);
#endif
					ipmb_invalid(&resp);
					break;
			}
			break;

		case IPMB_NETFN_STORAGE:
			switch (req->cmd) {
				case IPMB_STORAGE_RESERVE_SDR:
					ipmb_send(&resp, reserve_sdr, sizeof(reserve_sdr));
					break;
				case IPMB_STORAGE_GET_SDR:
					ipmb_send(&resp, get_sdr, sizeof(get_sdr));
					break;
				case IPMB_STORAGE_GET_SEL_INFO:
					ipmb_send(&resp, sel_info, sizeof(sel_info));
					break;
				case IPMB_STORAGE_GET_SEL_ALLOCATION:
					ipmb_send(&resp, sel_alloc_info, sizeof(sel_alloc_info));
					break;
				case IPMB_STORAGE_GET_SEL_ENTRY:
					ipmb_send(&resp, sel_entry, sizeof(sel_entry));
					break;
				case IPMB_STORAGE_GET_SEL_TIME:
					ipmb_send(&resp, sel_timestamp, sizeof(sel_timestamp));
					break;
				default:
#ifdef DEBUG
					printf("Unknown storage cmd 0x%02x\n", req->cmd);
					ipmb_dump_req(req);
#endif
					ipmb_invalid(&resp);
					break;
			}
			break;

		default:
#ifdef DEBUG
			printf("Unknown netFn 0x%02x\n", req->netFn);
			ipmb_dump_req(req);
#endif
			ipmb_invalid(&resp);
			break;
	}
}

void decode_ipmb_pkt(unsigned char *buf, int len)
{
	struct ipmb_req req;

	if ((buf[2] != ipmb_csum(buf, 2)) ||
	    (buf[len-1] != ipmb_csum(buf+3, len-4)))
		return; /* Checksum wrong */

	req.rsSA = buf[0];
	req.netFn = (buf[1]>>2)&0x3f;
	req.rsLUN = (buf[1] & 0x03);
	req.rqSA = buf[3];
	req.rqSEQ = (buf[4]>>2)&0x3f;
	req.rqLUN = (buf[4] & 0x03);
	req.cmd = buf[5];
	req.data = buf+6;
	req.datalen = len - 6 - 1;

	ipmb_cmd(&req);
}